Patent US2421597A successfully refreshed from Google Patents.
US2421597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated cyclic ethers
Assignee: Resinous Products and Chemical Co
•
Filing: 1944-04-01
•
Granted: 1947-06-03
•
Expires: 1964-04-01
Abstract
No abstract record available.
Inventors
- 👤 Herman A Bruson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:19
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/01; C07C255/11; C07C255/13; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/115; C07C43/13; C07C43/14; C07C43/164; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/06; C07D333/14; C07D333/16; C07C2602/00; C07C2602/02; C07C2602/04; C07C2602/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-02 | 1950-12-02 | 1951-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-02 | 1954-12-02 | 1955-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-02 | 1958-12-02 | 1959-06-03 | $7700.00 | Window Closed / Lapsed |